Hey everyone, just joined the forum.
I have a 68 Camaro with a 350 bored .60 over, flat top pistons, 300 hp douple humps, Torker II intake, headers, 600 Edlebrok carb., 2 1/2 in. exhaust, and a ProForm 50,000 volt HEI. The HEI and the Torker II intake are new, I had a old Torker before, and just a GM HEI. Ok now my question, while installing the HEI and getting my timing correct, when I pulled out the #1 spark plug I noticed it was paper bag brown. To Lean , right, well I then checked the #3 plug, it was not like #1 was, it was more darker like new , but little blacker. Have I got a burnt valve? Or am I running to lean? I haven't pulled anymore plugs to check them yet. It seems to run very strong as normal, though yesterday I noticed a couple of times a flat spot where it wanted to bog a little while in between shifts. I know the plugs probably need replaced they have been in there awhile, but the car only gets driven maybe 3000 miles or less a year.
Anybody help, or need anymore info?